Documentation/devicetree/bindings/i2c/i2c-at91.txt

   1 I2C for Atmel platforms
   2
   3 Required properties :
   4 - compatible : Must be "atmel,at91rm9200-i2c", "atmel,at91sam9261-i2c",
   5      "atmel,at91sam9260-i2c", "atmel,at91sam9g20-i2c", "atmel,at91sam9g10-i2c",
   6      "atmel,at91sam9x5-i2c" or "atmel,sama5d2-i2c"
   7 - reg: physical base address of the controller and length of memory mapped
   8      region.
   9 - interrupts: interrupt number to the cpu.
  10 - #address-cells = <1>;
  11 - #size-cells = <0>;
  12 - clocks: phandles to input clocks.
  13
  14 Optional properties:
  15 - clock-frequency: Desired I2C bus frequency in Hz, otherwise defaults to 100000
  16 - dmas: A list of two dma specifiers, one for each entry in dma-names.
  17 - dma-names: should contain "tx" and "rx".
  18 - atmel,fifo-size: maximum number of data the RX and TX FIFOs can store for FIFO
  19   capable I2C controllers.
  20 - Child nodes conforming to i2c bus binding
  21
  22 Examples :
  23
  24 i2c0: i2c@fff84000 {
  25         compatible = "atmel,at91sam9g20-i2c";
  26         reg = <0xfff84000 0x100>;
  27         interrupts = <12 4 6>;
  28         #address-cells = <1>;
  29         #size-cells = <0>;
  30         clocks = <&twi0_clk>;
  31         clock-frequency = <400000>;
  32
  33         24c512@50 {
  34                 compatible = "24c512";
  35                 reg = <0x50>;
  36                 pagesize = <128>;
  37         }
  38 }
  39
  40 i2c0: i2c@f8034600 {
  41         compatible = "atmel,sama5d2-i2c";
  42         reg = <0xf8034600 0x100>;
  43         interrupts = <19 IRQ_TYPE_LEVEL_HIGH 7>;
  44         dmas = <&dma0
  45                 (AT91_XDMAC_DT_MEM_IF(0) | AT91_XDMAC_DT_PER_IF(1))
  46                 AT91_XDMAC_DT_PERID(11)>,
  47                <&dma0
  48                 (AT91_XDMAC_DT_MEM_IF(0) | AT91_XDMAC_DT_PER_IF(1))
  49                 AT91_XDMAC_DT_PERID(12)>;
  50         dma-names = "tx", "rx";
  51         #address-cells = <1>;
  52         #size-cells = <0>;
  53         clocks = <&flx0>;
  54         atmel,fifo-size = <16>;
  55
  56         wm8731: wm8731@1a {
  57                 compatible = "wm8731";
  58                 reg = <0x1a>;
  59         };
  60 };